Keeping computers up-to-date was not a defence against NotPetya ransomware, Microsoft concedes.
Cyber-security agency Cert NZ said 364 attacks and incidents were reported to it during its first three months of operation, with victims estimating their losses at $730,000.
Seventy of the incidents were referred to the police, though operations manager Declan Ingram conceded it would not necessarily know if the referrals resulted in any action.
The agency’s first quarterly report indicated New Zealand got off lightly from the WannaCry ransomware attacks, with just six reported infections.
Actors Peter Dinklage (Tyrion Lannister) and Emilia Clarke (Daenerys Targaryen) reportedly had their phone numbers published online as a result of a hack